Log-carrier for mounted sawmills.



PATEN'I'ED JUNE 7, 1904.

A. s. MoDONALD.

LOG CARRIER FOR MOUNTED SAWMILLS.

APPLICATION mum JULY 29, 1903.

2 sums-sum 1.

N0 HODEL.

INVENTUR] (1mm 5.171Bom1d,

WITNESSES TNE nomus Perms 00., PHQTO-LIY I PATENTED JUNE 7,1904. A. s. mupomm; I LOG CARRIER FOR MOUNTEDSAWMILLSJ APPLIOATI ON FILED JULY 29,1903.

2 sums-sum 2.

no MODEL.

llll

dllllllll I N V E N T U R Gum-T 5. mmonnld, 35

YWITNEESEE UNITED STATES ALBERT s. McDONALD OF TRIVOLI, ILLINOIS.

LOG-CARRIER FOR MOUNTED SAWMILLS.

SPECIFICATION forming part of Letters Patent No. 761,697, d ed June '7, 1904. 7

Application filed July 29, 1903.

To all whom it mag concern.-

Be it known that I, ALBERT S. MCDONALD, a citizen of the United States, residing at Trivoli, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Log-Carriers for Mounted Sawmills; and Ido hereby declare that thefollowing is a full, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use the same.

This invention pertains to improvements in mounted sawmills, and more particularly to log-carriers for the same.

The object of the present invention is to combine a log-carrier with a mounted sawmill, so that larger quantities of lumber may be sawed out in a given time than has heretofore been possible.

A-further object is to provide mechanism for operating the log carrier which shall have connection with the saw-driving gear.

In the accompanying drawings, Figure 1 is a side elevation of a mounted sawmill, showing my attachment. Fig. 2 is a plan view of the same. Fig. 3 is an end elevation of alogcarriage, showing rollers on which it is carried. Fig. 4 is a perspective view of the mechanism used for operating my improved logcarrier attachment. Fig. 5 is aside elevation of a lever mechanism for use in shifting a gear for operating and releasing the log-carrier mechanism.

In the drawings, A indicates the-sawmillplatform, and B carrying-wheels on which it is mounted. At 0 is represented a track on which is carried, by means of rollers D, the usual log-carriage E. This is clearly shown in Fig. 3, wherein the rollers are provided with side flanges -D to prevent them leaving the rails. A series of these members are pro- VidGCLGO that the carriage will be supported its full length and in a way that very little friction will result, thereby permitting the carriage to move freely back and forth in performing its work. Mounted also on the platform A is a pair of sills F, constituting the saw-frame on which the operating-gear is mounted. I desire to makeit plain, however,

that I make no claim whatever on the mountof power.-

Serial No. 167,489- (No model.)

ed platform, nor any of its parts described thus far, nor, indeed, to the particular gear for driving the saw; but I do claim as my own the means to be described hereinafter for carrying the logs to the saw and the special mechanism for controlling the same. The said gear,

I shall describe, however, and afterward point out the portions to which I wish to lay claim, 'both as to construction and the broad idea. J ournaled on the sills F is a shaft Gr, carrying at one end a saw I-I, its other end having a pulley I, driven by a belt J from any source Also mounted on the sills is a shaft K, receiving motion from the shaft G for driving the log-carrier E back and forth, the connections of which are not shown, since I attach no claim thereto. Adjacent to the shaft Gris a shaft L, carrying a winding-drum M, also a gear-wheel N, and below said shaft L is a shaft 0, Fig. 4, also having a gear 1 adapted to mesh with the said gear N in the manner hereinafter described in detail. Now adjoining the platform" A at the, left is a pair of sills Q, having rails R mounted thereon,

said sills being slanted from the surface of the ground up to the platform, as shown in Fig. 1. A log-carrier comprising a suitable frame mounted. on wheels to form a car is mounted on the track R thus formed, and at its front end is attached a cable S, adapted to Wind upon the drum N described.

To my knowledge a'log-carrier has not been heretofore employed 1n connection w1th sawmills for the purpose of keeping the saw constantly supplied with material to be reduced into lumber. Much less has there been a device of this nature in connection with a mounted sawmill. The advantage in a log-carrier of this kind will be appreciated when it is known that heretofore the saw when through with one piece of work remained idle for some little time awaiting the arrival of another timber to be sawed up. This course of procedure is expensive and much time is lost, and it is my desire to provide means whereby the needed material can be kept ready at hand, so that no time need be lost, and in this way many more thousand feet of lumber may be turned out in a given time than has been possible heretofore.

The track R is extended out into the yard or territory wherein the logs are piled, so that the carrier R may be run out and loaded as often as desired. 7

A pulley 0, carried on the shaft 0, hereinbefore described, receives motion by means of a belt 0 from a pulley O on the said shaft G, and in this way said shaft 0 is in continual motion during the running of the saw H. The shaft is carried at one end in a bearing T, secured to one of the sills of the platform A, and its other end is carried in an arm U, pivoted at one end to an ear V, secured to the platform A. The opposite end of such arm is carried by a link W, whose upper end is connected with an arm X of a rock-shaft Y, carried in a bearing 2 carried on the sill F, as shown. The opposite end of the said rockshaft Y has a vertical arm 3, to whose free end is pivoted the end of a rod 4:, having attachment with a lever 5, pivoted on the said sill F, Figs. 1 and 5. A sector 6 is mounted adjacent to the lever and isnotched in two places to form the extreme positions of said lever. As the parts thus described are positioned in Fig. A it will be observed that a movement of the lever, as viewed in Figs. 1 and 5, toward the left will depress the arm U and carry the pinion-gear P away from the gear N, whereas a movement to the right will engage said gears. As the log-carriage E moves back and forth in the act of bringing the log against the saw and the last plank is about to be cut the operator grasps the lever 5 and throws it toward the shaft G, that carries the saw, with the result that the pinion, which is in constant revolution, as before stated, is made to mesh with the gear N. The drum M is thus immediately set in motion to take up the cable S and draw the log-carrier R upon the platform A ready for loading the carriage E after the one being sawed is completed. I prefer to have the carrier R and the carriage E of substantially the same height, so that the log may be easily transferred from one to the other. Although not shown in the drawings, the usual fastening devices are mounted on said carriage E to hold the log firmly during the sawing operation. Evidently the carrier B may be drawn up to its position at any time ready with its load, and, furthermore, several logs may be carried thereon, so that fewer trips will be necessary.

I desire to make it clearly understood that I do not wish to confine myself to any particular means in carrying out my invention, as equivalent mechanism may be employed that will accomplish the same end. As stated, I

lay no claim to the mounted mill except in combination with the log-carrier. It will be understood that the carrier is released when the pinion P is disengaged from the gear N, permitting the windlass or drum M to revolve freely. The carrier maybe so located that it will start down the inclined track of its own volition or a mere push will accomplish the same purpose. The shaft 0 has sufiieient play in its bearing T so that its end carrying the pinion may be raised and lowered suflieiently to cause the gears to engage with perfect ease.

In using mounted sawmills heretofore it has been customary to let the wheels into the ground in order to have the sawmill-platform suflieiently low to permit the logs to be worked up onto it by means of levers and canthoeks, making the work very laborious and slow. But as I arrange the outfit the mill is simply drawn to the desired spot and work is commenced at once without preparation of the kind mentioned.

I claim 1. The combination, in a mounted sawmill of the character described, of the mill-platform A, the log-carriage E thereon, the saw H, mechanism for driving it, the leg-carrier R for supplying the mill with legs, a track for the same, a windlass M for moving the log-carrier R, a gear N fol; driving the windlass, a shaft 0, a pinion P on the shaft for engaging the gear N and means for throwing the pinion and gear into mesh substantially as set forth and for the purposes described.

2. In combination with a mounted sawmill of the character described, the mill-platform A, the log-carriage E carried thereon for reciprocating movement, the saw II and its driving-gear, the log-carrier R for supplying the mill with legs, a track R. for the same, a windlass M in connection with the saw-gear, a shaft O, a pinion P thereon, a gear N for driving the windlass and with which the pinion is adapted to engage for operating the windlass, means for driving the shaft 0 and its pinion, a vertically-operated arm U carrying one end of the shaft 0 for engaging the pinion P and gearNand disengaging the same as set forth and means for moving said arm U, and a cable for connection with the carrier R and the windlass all arranged substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

ALBERT S. MCDONALD.

W itnesses L. M. TnUnLow, A. KEITHLEY.

lIO 

